X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2FCursor.cpp;h=0e1c3ded5558c9dd62283ad29d738fc1c15e552d;hb=26ba2a65838731ce639a09539f617cb0f0be3b22;hp=e9bdf895b7835f18447fa47979552aa705c897b3;hpb=9edbeef7b7eeb21cadec451e71b1109cd4dfb219;p=lyx.git

diff --git a/src/Cursor.cpp b/src/Cursor.cpp
index e9bdf895b7..0e1c3ded55 100644
--- a/src/Cursor.cpp
+++ b/src/Cursor.cpp
@@ -14,14 +14,12 @@
 
 #include <config.h>
 
+#include "Cursor.h"
+
 #include "Buffer.h"
 #include "BufferView.h"
 #include "CoordCache.h"
-#include "Cursor.h"
 #include "CutAndPaste.h"
-#include "DispatchResult.h"
-#include "Encoding.h"
-#include "Font.h"
 #include "FuncCode.h"
 #include "FuncRequest.h"
 #include "Language.h"
@@ -29,29 +27,30 @@
 #include "LyXAction.h"
 #include "LyXRC.h"
 #include "Paragraph.h"
-#include "ParIterator.h"
 #include "Row.h"
+#include "texstream.h"
 #include "Text.h"
 #include "TextMetrics.h"
 #include "TocBackend.h"
 
 #include "support/debug.h"
 #include "support/docstream.h"
-#include "support/ExceptionMessage.h"
 #include "support/gettext.h"
 #include "support/lassert.h"
 
+#include "insets/InsetLayout.h"
 #include "insets/InsetTabular.h"
-#include "insets/InsetText.h"
 
 #include "mathed/InsetMath.h"
 #include "mathed/InsetMathBrace.h"
+#include "mathed/InsetMathEnsureMath.h"
 #include "mathed/InsetMathScript.h"
 #include "mathed/MacroTable.h"
 #include "mathed/MathData.h"
-#include "mathed/MathMacro.h"
+#include "mathed/MathFactory.h"
+#include "mathed/InsetMathMacro.h"
 
-#include "support/bind.h"
+#include "frontends/Application.h"
 
 #include <sstream>
 #include <limits>
@@ -66,32 +65,32 @@ namespace {
 
 // Find position closest to (x, y) in cell given by iter.
 // Used only in mathed
-DocIterator bruteFind2(Cursor const & c, int x, int y)
+DocIterator bruteFind(Cursor const & c, int x, int y)
 {
 	double best_dist = numeric_limits<double>::max();
 
 	DocIterator result;
 
 	DocIterator it = c;
-	it.top().pos() = 0;
+	it.pos() = 0;
 	DocIterator et = c;
-	et.top().pos() = et.top().asInsetMath()->cell(et.top().idx()).size();
+	et.pos() = et.lastpos();
 	for (size_t i = 0;; ++i) {
 		int xo;
 		int yo;
 		Inset const * inset = &it.inset();
-		CoordCache const & cache = c.bv().coordCache();
+		CoordCache::Insets const & insetCache = c.bv().coordCache().getInsets();
 
 		// FIXME: in the case where the inset is not in the cache, this
 		// means that no part of it is visible on screen. In this case
 		// we don't do elaborate search and we just return the forwarded
 		// DocIterator at its beginning.
-		if (!cache.getInsets().has(inset)) {
+		if (!insetCache.has(inset)) {
 			it.top().pos() = 0;
 			return it;
 		}
 
-		Point const o = cache.getInsets().xy(inset);
+		Point const o = insetCache.xy(inset);
 		inset->cursorPos(c.bv(), it.top(), c.boundary(), xo, yo);
 		// Convert to absolute
 		xo += o.x_;
@@ -113,181 +112,601 @@ DocIterator bruteFind2(Cursor const & c, int x, int y)
 }
 
 
-/*
-/// moves position closest to (x, y) in given box
-bool bruteFind(Cursor & cursor,
-	int x, int y, int xlow, int xhigh, int ylow, int yhigh)
-{
-	LASSERT(!cursor.empty(), return false);
-	Inset & inset = cursor[0].inset();
-	BufferView & bv = cursor.bv();
-
-	CoordCache::InnerParPosCache const & cache =
-		bv.coordCache().getParPos().find(cursor.bottom().text())->second;
-	// Get an iterator on the first paragraph in the cache
-	DocIterator it(inset);
-	it.push_back(CursorSlice(inset));
-	it.pit() = cache.begin()->first;
-	// Get an iterator after the last paragraph in the cache
-	DocIterator et(inset);
-	et.push_back(CursorSlice(inset));
-	et.pit() = prev(cache.end(), 1)->first;
-	if (et.pit() >= et.lastpit())
-		et = doc_iterator_end(inset);
-	else
-		++et.pit();
+} // namespace
 
-	double best_dist = numeric_limits<double>::max();
-	DocIterator best_cursor = et;
-
-	for ( ; it != et; it.forwardPos(true)) {
-		// avoid invalid nesting when selecting
-		if (!cursor.selection() || positionable(it, cursor.anchor_)) {
-			Point p = bv.getPos(it, false);
-			int xo = p.x_;
-			int yo = p.y_;
-			if (xlow <= xo && xo <= xhigh && ylow <= yo && yo <= yhigh) {
-				double const dx = xo - x;
-				double const dy = yo - y;
-				double const d = dx * dx + dy * dy;
-				// '<=' in order to take the last possible position
-				// this is important for clicking behind \sum in e.g. '\sum_i a'
-				if (d <= best_dist) {
-					//	lyxerr << "*" << endl;
-					best_dist   = d;
-					best_cursor = it;
-				}
-			}
+
+//
+// CursorData
+//
+
+
+CursorData::CursorData()
+	: DocIterator(), anchor_(), selection_(false), mark_(false),
+	  word_selection_(false), current_font(inherit_font)
+{}
+
+
+CursorData::CursorData(Buffer * buffer)
+	: DocIterator(buffer), anchor_(), selection_(false), mark_(false),
+	  word_selection_(false), current_font(inherit_font)
+{}
+
+
+CursorData::CursorData(DocIterator const & dit)
+	: DocIterator(dit), anchor_(), selection_(false), mark_(false),
+	  word_selection_(false), current_font(inherit_font)
+{}
+
+
+
+
+ostream & operator<<(ostream & os, CursorData const & cur)
+{
+	os << "\n cursor:                                | anchor:\n";
+	for (size_t i = 0, n = cur.depth(); i != n; ++i) {
+		os << " " << cur[i] << " | ";
+		if (i < cur.anchor_.depth())
+			os << cur.anchor_[i];
+		else
+			os << "-------------------------------";
+		os << "\n";
+	}
+	for (size_t i = cur.depth(), n = cur.anchor_.depth(); i < n; ++i) {
+		os << "------------------------------- | " << cur.anchor_[i] << "\n";
+	}
+	os << " selection: " << cur.selection_
+//	   << " x_target: " << cur.x_target_
+	   << " boundary: " << cur.boundary() << endl;
+	return os;
+}
+
+
+LyXErr & operator<<(LyXErr & os, CursorData const & cur)
+{
+	os.stream() << cur;
+	return os;
+}
+
+
+void CursorData::reset()
+{
+	clear();
+	push_back(CursorSlice(buffer()->inset()));
+	anchor_ = doc_iterator_begin(buffer());
+	anchor_.clear();
+	new_word_ = doc_iterator_begin(buffer());
+	new_word_.clear();
+	selection_ = false;
+	mark_ = false;
+}
+
+
+void CursorData::setCursor(DocIterator const & cur)
+{
+	DocIterator::operator=(cur);
+}
+
+
+void CursorData::setCursorSelectionTo(DocIterator dit)
+{
+	size_t i = 0;
+	// normalise dit
+	while (i < dit.depth() && i < anchor_.depth() && dit[i] == anchor_[i])
+		++i;
+	if (i != dit.depth()) {
+		// otherwise the cursor is already normal
+		if (i == anchor_.depth())
+			// dit is a proper extension of the anchor_
+			dit.cutOff(i - 1);
+		else if (i + 1 < dit.depth()) {
+			// one has dit[i] != anchor_[i] but either dit[i-1] == anchor_[i-1]
+			// or i == 0. Remove excess.
+			dit.cutOff(i);
+			if (dit[i] > anchor_[i])
+				// place dit after the inset it was in
+				++dit.pos();
 		}
 	}
+	setCursor(dit);
+	setSelection();
+}
 
-	if (best_cursor != et) {
-		cursor.setCursor(best_cursor);
-		return true;
+
+void CursorData::setCursorToAnchor()
+{
+	if (selection()) {
+		DocIterator normal = anchor_;
+		while (depth() < normal.depth())
+			normal.pop_back();
+		if (depth() < anchor_.depth() && top() <= anchor_[depth() - 1])
+			++normal.pos();
+		setCursor(normal);
 	}
+}
 
-	return false;
+
+CursorSlice CursorData::normalAnchor() const
+{
+	if (!selection())
+		return top();
+	// LASSERT: There have been several bugs around this code, that seem
+	// to involve failures to reset the anchor. We can at least not crash
+	// in release mode by resetting it ourselves.
+	if (anchor_.depth() < depth()) {
+		LYXERR0("Cursor is deeper than anchor. PLEASE REPORT.\nCursor is"
+		        << *this);
+		const_cast<DocIterator &>(anchor_) = *this;
+	}
+
+	CursorSlice normal = anchor_[depth() - 1];
+	if (depth() < anchor_.depth() && top() <= normal) {
+		// anchor is behind cursor -> move anchor behind the inset
+		++normal.pos();
+	}
+	return normal;
 }
-*/
 
-/*
-/// moves position closest to (x, y) in given box
-bool bruteFind3(Cursor & cur, int x, int y, bool up)
+
+void CursorData::setSelection()
 {
-	BufferView & bv = cur.bv();
-	int ylow  = up ? 0 : y + 1;
-	int yhigh = up ? y - 1 : bv.workHeight();
-	int xlow = 0;
-	int xhigh = bv.workWidth();
+	selection(true);
+	if (idx() == normalAnchor().idx() &&
+	    pit() == normalAnchor().pit() &&
+	    pos() == normalAnchor().pos())
+		selection(false);
+}
 
-// FIXME: bit more work needed to get 'from' and 'to' right.
-	pit_type from = cur.bottom().pit();
-	//pit_type to = cur.bottom().pit();
-	//lyxerr << "Pit start: " << from << endl;
 
-	//lyxerr << "bruteFind3: x: " << x << " y: " << y
-	//	<< " xlow: " << xlow << " xhigh: " << xhigh
-	//	<< " ylow: " << ylow << " yhigh: " << yhigh
-	//	<< endl;
-	DocIterator it = doc_iterator_begin(cur.buffer());
-	it.pit() = from;
-	DocIterator et = doc_iterator_end(cur.buffer());
+void CursorData::setSelection(DocIterator const & where, int n)
+{
+	setCursor(where);
+	selection(true);
+	anchor_ = where;
+	pos() += n;
+}
 
-	double best_dist = numeric_limits<double>::max();
-	DocIterator best_cursor = et;
-
-	for ( ; it != et; it.forwardPos()) {
-		// avoid invalid nesting when selecting
-		if (bv.cursorStatus(it) == CUR_INSIDE
-		    && (!cur.selection() || positionable(it, cur.realAnchor()))) {
-			// If this function is ever used again, check
-			// whether this is the same as "bv.getPos(it,
-			// false)" with boundary = false.
-			Point p = bv.getPos(it);
-			int xo = p.x_;
-			int yo = p.y_;
-			if (xlow <= xo && xo <= xhigh && ylow <= yo && yo <= yhigh) {
-				double const dx = xo - x;
-				double const dy = yo - y;
-				double const d = dx * dx + dy * dy;
-				//lyxerr << "itx: " << xo << " ity: " << yo << " d: " << d
-				//	<< " dx: " << dx << " dy: " << dy
-				//	<< " idx: " << it.idx() << " pos: " << it.pos()
-				//	<< " it:\n" << it
-				//	<< endl;
-				// '<=' in order to take the last possible position
-				// this is important for clicking behind \sum in e.g. '\sum_i a'
-				if (d <= best_dist) {
-					//lyxerr << "*" << endl;
-					best_dist   = d;
-					best_cursor = it;
-				}
-			}
+
+void CursorData::resetAnchor()
+{
+	anchor_ = *this;
+	checkNewWordPosition();
+}
+
+
+CursorSlice CursorData::selBegin() const
+{
+	if (!selection())
+		return top();
+	return normalAnchor() < top() ? normalAnchor() : top();
+}
+
+
+CursorSlice CursorData::selEnd() const
+{
+	if (!selection())
+		return top();
+	return normalAnchor() > top() ? normalAnchor() : top();
+}
+
+
+DocIterator CursorData::selectionBegin() const
+{
+	if (!selection())
+		return *this;
+
+	DocIterator di;
+	// FIXME: This is a work-around for the problem that
+	// CursorSlice doesn't keep track of the boundary.
+	if (normalAnchor() == top())
+		di = anchor_.boundary() > boundary() ? anchor_ : *this;
+	else
+		di = normalAnchor() < top() ? anchor_ : *this;
+	di.resize(depth());
+	return di;
+}
+
+
+DocIterator CursorData::selectionEnd() const
+{
+	if (!selection())
+		return *this;
+
+	DocIterator di;
+	// FIXME: This is a work-around for the problem that
+	// CursorSlice doesn't keep track of the boundary.
+	if (normalAnchor() == top())
+		di = anchor_.boundary() < boundary() ? anchor_ : *this;
+	else
+		di = normalAnchor() > top() ? anchor_ : *this;
+
+	if (di.depth() > depth()) {
+		di.resize(depth());
+		++di.pos();
+		di.boundary(true);
+	}
+	return di;
+}
+
+
+namespace {
+
+docstring parbreak(CursorData const * cur)
+{
+	if (cur->inset().getLayout().parbreakIgnored())
+		return docstring();
+	odocstringstream os;
+	os << '\n';
+	// only add blank line if we're not in a ParbreakIsNewline situation
+	if (!cur->inset().getLayout().parbreakIsNewline()
+	    && !cur->paragraph().layout().parbreak_is_newline)
+		os << '\n';
+	return os.str();
+}
+
+}
+
+
+docstring CursorData::selectionAsString(bool const with_label, bool const skipdelete) const
+{
+	if (!selection())
+		return docstring();
+
+	if (inMathed())
+		return cap::grabSelection(*this);
+
+	int label = with_label
+		? AS_STR_LABEL | AS_STR_INSETS : AS_STR_INSETS;
+	if (skipdelete)
+		label = with_label
+				? AS_STR_LABEL | AS_STR_INSETS | AS_STR_SKIPDELETE
+				: AS_STR_INSETS | AS_STR_SKIPDELETE;
+
+	idx_type const startidx = selBegin().idx();
+	idx_type const endidx = selEnd().idx();
+	if (startidx != endidx) {
+		// multicell selection
+		InsetTabular * table = inset().asInsetTabular();
+		LASSERT(table, return docstring());
+		return table->asString(startidx, endidx);
+	}
+
+	ParagraphList const & pars = text()->paragraphs();
+
+	pit_type const startpit = selBegin().pit();
+	pit_type const endpit = selEnd().pit();
+	size_t const startpos = selBegin().pos();
+	size_t const endpos = selEnd().pos();
+
+	if (startpit == endpit)
+		return pars[startpit].asString(startpos, endpos, label);
+
+	// First paragraph in selection
+	docstring result = pars[startpit].
+		asString(startpos, pars[startpit].size(), label)
+		+ parbreak(this);
+
+	// The paragraphs in between (if any)
+	for (pit_type pit = startpit + 1; pit != endpit; ++pit) {
+		Paragraph const & par = pars[pit];
+		result += par.asString(0, par.size(), label)
+			+ parbreak(this);
+	}
+
+	// Last paragraph in selection
+	result += pars[endpit].asString(0, endpos, label);
+
+	return result;
+}
+
+
+void CursorData::info(odocstream & os, bool devel_mode) const
+{
+	for (int i = 1, n = depth(); i < n; ++i) {
+		operator[](i).inset().infoize(os);
+		os << "  ";
+	}
+	if (pos() != 0) {
+		Inset const * inset = prevInset();
+		// prevInset() can return 0 in certain case.
+		if (inset)
+			prevInset()->infoize2(os);
+	}
+	if (devel_mode) {
+		InsetMath * math = inset().asInsetMath();
+		if (math)
+			os << _(", Inset: ") << math->id();
+		os << _(", Cell: ") << idx();
+		os << _(", Position: ") << pos();
+	}
+
+}
+
+docstring CursorData::currentState(bool devel_mode) const
+{
+	if (inMathed()) {
+		odocstringstream os;
+		info(os, devel_mode);
+		return os.str();
+	}
+
+	if (inTexted())
+		return text()->currentState(*this, devel_mode);
+
+	return docstring();
+}
+
+
+void CursorData::markNewWordPosition()
+{
+	if (lyxrc.spellcheck_continuously && inTexted() && new_word_.empty()) {
+		FontSpan nw = locateWord(WHOLE_WORD);
+		if (nw.size() == 1) {
+			LYXERR(Debug::DEBUG, "start new word: "
+				<< " par: " << pit()
+				<< " pos: " << nw.first);
+			new_word_ = *this;
 		}
 	}
+}
+
+
+void CursorData::clearNewWordPosition()
+{
+	if (!new_word_.empty()) {
+		LYXERR(Debug::DEBUG, "clear new word: "
+			<< " par: " << pit()
+			<< " pos: " << pos());
+		new_word_.resize(0);
+	}
+}
+
+
+void CursorData::checkNewWordPosition()
+{
+	if (!lyxrc.spellcheck_continuously || new_word_.empty())
+		return ;
+	// forget the position of the current new word if
+	// 1) or the remembered position was "broken"
+	// 2) or the count of nested insets changed
+	// 3) the top-level inset is not the same anymore
+	// 4) the cell index changed
+	// 5) or the paragraph changed
+	// 6) or the cursor pos is out of paragraph bound
+	if (new_word_.fixIfBroken()
+	    || depth() != new_word_.depth()
+	    || &inset() != &new_word_.inset()
+	    || pit() != new_word_.pit()
+	    || idx() != new_word_.idx()
+	    || new_word_.pos() > new_word_.lastpos())
+			clearNewWordPosition();
+	else {
+		FontSpan nw = locateWord(WHOLE_WORD);
+		if (!nw.empty()) {
+			FontSpan ow = new_word_.locateWord(WHOLE_WORD);
+			if (nw.intersect(ow).empty())
+				clearNewWordPosition();
+			else
+				LYXERR(Debug::DEBUG, "new word: "
+					   << " par: " << pit()
+					   << " pos: " << nw.first << ".." << nw.last);
+		} else
+			clearNewWordPosition();
+	}
+}
+
+
+void CursorData::clearSelection()
+{
+	selection(false);
+	setWordSelection(false);
+	setMark(false);
+	resetAnchor();
+}
+
+
+int CursorData::countInsetsInSelection(InsetCode const & inset_code) const
+{
+	if (!selection_)
+		return 0;
+
+	DocIterator from, to;
+	from = selectionBegin();
+	to = selectionEnd();
+
+	int count = 0;
+
+	if (!from.nextInset())      //move to closest inset
+		from.forwardInset();
+
+	while (!from.empty() && from < to) {
+		Inset * inset = from.nextInset();
+		if (!inset)
+			break;
+		if (inset->lyxCode() == inset_code)
+			count ++;
+		from.forwardInset();
+	}
+	return count;
+}
+
+
+bool CursorData::insetInSelection(InsetCode const & inset_code) const
+{
+	if (!selection_)
+		return false;
+
+	DocIterator from, to;
+	from = selectionBegin();
+	to = selectionEnd();
+
+	if (!from.nextInset())      //move to closest inset
+		from.forwardInset();
+
+	while (!from.empty() && from < to) {
+		Inset * inset = from.nextInset();
+		if (!inset)
+			break;
+		if (inset->lyxCode() == inset_code)
+			return true;
+		from.forwardInset();
+	}
+	return false;
+}
+
+
+bool CursorData::fixIfBroken()
+{
+	bool const broken_cursor = DocIterator::fixIfBroken();
+	bool const broken_anchor = anchor_.fixIfBroken();
+
+	if (broken_cursor || broken_anchor) {
+		clearNewWordPosition();
+		clearSelection();
+		return true;
+	}
+	return false;
+}
+
+
+void CursorData::sanitize()
+{
+	DocIterator::sanitize();
+	new_word_.sanitize();
+	if (selection())
+		anchor_.sanitize();
+	else
+		resetAnchor();
+}
+
+
+bool CursorData::undoAction()
+{
+	if (!buffer()->undo().undoAction(*this))
+		return false;
+	sanitize();
+	return true;
+}
+
 
-	//lyxerr << "best_dist: " << best_dist << " cur:\n" << best_cursor << endl;
-	if (best_cursor == et)
+bool CursorData::redoAction()
+{
+	if (!buffer()->undo().redoAction(*this))
 		return false;
-	cur.setCursor(best_cursor);
+	sanitize();
 	return true;
 }
-*/
-} // namespace anon
 
 
-CursorData::CursorData()
-	: DocIterator(), anchor_(),
-	  selection_(false), mark_(false), word_selection_(false),
-	  logicalpos_(false), current_font(inherit_font),
-	  autocorrect_(false), macromode_(false)
-{}
+void CursorData::finishUndo() const
+{
+	buffer()->undo().finishUndo();
+}
 
 
-CursorData::CursorData(Buffer * buffer)
-	: DocIterator(buffer), anchor_(),
-	  selection_(false), mark_(false), word_selection_(false),
-	  logicalpos_(false), current_font(inherit_font),
-	  autocorrect_(false), macromode_(false)
-{}
+void CursorData::beginUndoGroup() const
+{
+	buffer()->undo().beginUndoGroup(*this);
+}
 
 
-CursorData::CursorData(DocIterator const & dit)
-	: DocIterator(dit), anchor_(),
-	  selection_(false), mark_(false), word_selection_(false),
-	  logicalpos_(false), current_font(inherit_font),
-	  autocorrect_(false), macromode_(false)
-{}
+void CursorData::endUndoGroup() const
+{
+	buffer()->undo().endUndoGroup(*this);
+}
+
+
+void CursorData::splitUndoGroup() const
+{
+	buffer()->undo().splitUndoGroup(*this);
+}
 
 
+void CursorData::recordUndo(pit_type from, pit_type to) const
+{
+	buffer()->undo().recordUndo(*this, from, to);
+}
+
+
+void CursorData::recordUndo(pit_type from) const
+{
+	buffer()->undo().recordUndo(*this, from, pit());
+}
+
+
+void CursorData::recordUndo(UndoKind kind) const
+{
+	buffer()->undo().recordUndo(*this, kind);
+}
+
+
+void CursorData::recordUndoInset(Inset const * inset) const
+{
+	buffer()->undo().recordUndoInset(*this, inset);
+}
+
+
+void CursorData::recordUndoFullBuffer() const
+{
+	buffer()->undo().recordUndoFullBuffer(*this);
+}
+
+
+void CursorData::recordUndoBufferParams() const
+{
+	buffer()->undo().recordUndoBufferParams(*this);
+}
+
+
+void CursorData::recordUndoSelection() const
+{
+	if (inMathed()) {
+		if (cap::multipleCellsSelected(*this))
+			recordUndoInset();
+		else
+			recordUndo();
+	} else {
+		buffer()->undo().recordUndo(*this,
+			selBegin().pit(), selEnd().pit());
+	}
+}
+
+
+int CursorData::currentMode() const
+{
+	LASSERT(!empty(), return Inset::UNDECIDED_MODE);
+	for (int i = depth() - 1; i >= 0; --i) {
+		int res = operator[](i).inset().currentMode();
+		bool locked_mode = operator[](i).inset().lockedMode();
+		// Also return UNDECIDED_MODE when the mode is locked,
+		// as in this case it is treated the same as TEXT_MODE
+		if (res != Inset::UNDECIDED_MODE || locked_mode)
+			return res;
+	}
+	return Inset::TEXT_MODE;
+}
 
 
-ostream & operator<<(ostream & os, CursorData const & cur)
+bool CursorData::confirmDeletion(bool const before) const
 {
-	os << "\n cursor:                                | anchor:\n";
-	for (size_t i = 0, n = cur.depth(); i != n; ++i) {
-		os << " " << cur[i] << " | ";
-		if (i < cur.anchor_.depth())
-			os << cur.anchor_[i];
-		else
-			os << "-------------------------------";
-		os << "\n";
-	}
-	for (size_t i = cur.depth(), n = cur.anchor_.depth(); i < n; ++i) {
-		os << "------------------------------- | " << cur.anchor_[i] << "\n";
+	if (!selection()) {
+		if (Inset const * inset = before ? prevInset() : nextInset())
+			return inset->confirmDeletion();
+	} else {
+		DocIterator dit = selectionBegin();
+		CursorSlice const end = selectionEnd().top();
+		for (; dit.top() < end; dit.top().forwardPos())
+			if (Inset const * inset = dit.nextInset())
+				if (inset->confirmDeletion())
+					return true;
 	}
-	os << " selection: " << cur.selection_
-//	   << " x_target: " << cur.x_target_
-	   << " boundary: " << cur.boundary() << endl;
-	return os;
+	return false;
 }
 
 
-LyXErr & operator<<(LyXErr & os, CursorData const & cur)
-{
-	os.stream() << cur;
-	return os;
-}
+
+//
+// Cursor
+//
 
 
 // be careful: this is called from the bv's constructor, too, so
@@ -295,41 +714,15 @@ LyXErr & operator<<(LyXErr & os, CursorData const & cur)
 Cursor::Cursor(BufferView & bv)
 	: CursorData(&bv.buffer()), bv_(&bv),
 	  x_target_(-1), textTargetOffset_(0),
+	  x_clickpos_(-1), y_clickpos_(-1),
 	  beforeDispatchPosX_(0), beforeDispatchPosY_(0)
 {}
 
 
 void Cursor::reset()
 {
-	clear();
-	push_back(CursorSlice(buffer()->inset()));
-	anchor_ = doc_iterator_begin(buffer());
-	anchor_.clear();
-	new_word_ = doc_iterator_begin(buffer());
-	new_word_.clear();
+	CursorData::reset();
 	clearTargetX();
-	selection_ = false;
-	mark_ = false;
-}
-
-
-// this (intentionally) does neither touch anchor nor selection status
-void Cursor::setCursor(DocIterator const & cur)
-{
-	DocIterator::operator=(cur);
-}
-
-
-void Cursor::setCursorToAnchor()
-{
-	if (selection()) {
-		DocIterator normal = anchor_;
-		while (depth() < normal.depth())
-			normal.pop_back();
-		if (depth() < anchor_.depth() && top() <= anchor_[depth() - 1])
-			++normal.pos();
-		setCursor(normal);
-	}
 }
 
 
@@ -397,15 +790,15 @@ void Cursor::dispatch(FuncRequest const & cmd0)
 
 	beginUndoGroup();
 
+	Inset * nextins = nextInset();
 	// Is this a function that acts on inset at point?
-	if (lyxaction.funcHasFlag(cmd.action(), LyXAction::AtPoint)
-	    && nextInset()) {
+	if (lyxaction.funcHasFlag(cmd.action(), LyXAction::AtPoint) && nextins) {
 		disp_.dispatched(true);
 		disp_.screenUpdate(Update::FitCursor | Update::Force);
 		FuncRequest tmpcmd = cmd;
-		LYXERR(Debug::DEBUG, "Cursor::dispatch: (AtPoint) cmd: "
+		LYXERR(Debug::ACTION, "Cursor::dispatch: (AtPoint) cmd: "
 			<< cmd0 << endl << *this);
-		nextInset()->dispatch(*this, tmpcmd);
+		nextins->dispatch(*this, tmpcmd);
 		if (disp_.dispatched()) {
 			endUndoGroup();
 			return;
@@ -415,7 +808,7 @@ void Cursor::dispatch(FuncRequest const & cmd0)
 	// store some values to be used inside of the handlers
 	beforeDispatchCursor_ = *this;
 	for (; depth(); pop(), boundary(false)) {
-		LYXERR(Debug::DEBUG, "Cursor::dispatch: cmd: "
+		LYXERR(Debug::ACTION, "Cursor::dispatch: cmd: "
 			<< cmd0 << endl << *this);
 
 		// In any of these cases, the cursor is invalid, and we should
@@ -437,7 +830,7 @@ void Cursor::dispatch(FuncRequest const & cmd0)
 	// it completely to get a 'bomb early' behaviour in case this
 	// object will be used again.
 	if (!disp_.dispatched()) {
-		LYXERR(Debug::DEBUG, "RESTORING OLD CURSOR!");
+		LYXERR(Debug::ACTION, "RESTORING OLD CURSOR!");
 		// We might have invalidated the cursor when removing an empty
 		// paragraph while the cursor could not be moved out the inset
 		// while we initially thought we could. This might happen when
@@ -480,6 +873,19 @@ DispatchResult const & Cursor::result() const
 }
 
 
+void Cursor::message(docstring const & msg) const
+{
+	disp_.setMessage(msg);
+}
+
+
+void Cursor::errorMessage(docstring const & msg) const
+{
+	disp_.setMessage(msg);
+	disp_.setError(true);
+}
+
+
 BufferView & Cursor::bv() const
 {
 	LBUFERR(bv_);
@@ -494,19 +900,44 @@ void Cursor::pop()
 }
 
 
-void Cursor::push(Inset & p)
+void Cursor::push(Inset & inset)
 {
-	push_back(CursorSlice(p));
-	p.setBuffer(*buffer());
+	push_back(CursorSlice(inset));
+	inset.setBuffer(*buffer());
 }
 
 
-void Cursor::pushBackward(Inset & p)
+void Cursor::pushBackward(Inset & inset)
 {
 	LASSERT(!empty(), return);
 	//lyxerr << "Entering inset " << t << " front" << endl;
+	push(inset);
+	inset.idxFirst(*this);
+}
+
+
+void Cursor::editInsertedInset()
+{
+	LASSERT(!empty(), return);
+	if (pos() == 0)
+		return;
+
+	InsetMath &p = prevMath();
+	if (!p.isActive())
+		return;
+
+	posBackward();
 	push(p);
 	p.idxFirst(*this);
+	// this could be a while() loop, but only one cell is not empty in
+	// cases we are interested in. The cell is not empty because we
+	// have inserted the selection in there.
+	if (!cell().empty()) {
+		// if it is not empty, move to the next one.
+		if (!inset().idxNext(*this))
+			// If there is no next one, exit the inset.
+			popForward();
+	}
 }
 
 
@@ -533,31 +964,6 @@ bool Cursor::popForward()
 }
 
 
-int Cursor::currentMode()
-{
-	LASSERT(!empty(), return Inset::UNDECIDED_MODE);
-	for (int i = depth() - 1; i >= 0; --i) {
-		int res = operator[](i).inset().currentMode();
-		bool locked_mode = operator[](i).inset().lockedMode();
-		// Also return UNDECIDED_MODE when the mode is locked,
-		// as in this case it is treated the same as TEXT_MODE
-		if (res != Inset::UNDECIDED_MODE || locked_mode)
-			return res;
-	}
-	return Inset::TEXT_MODE;
-}
-
-
-bool Cursor::inCoordCache() const
-{
-	CoordCache::Insets const & icache = bv_->coordCache().getInsets();
-	for (size_t i = 0 ; i < depth() ; ++i)
-		if (!icache.has(&(*this)[i].inset()))
-			return false;
-	return true;
-}
-
-
 void Cursor::getPos(int & x, int & y) const
 {
 	Point p = bv().getPos(*this);
@@ -574,92 +980,6 @@ Row const & Cursor::textRow() const
 }
 
 
-void Cursor::resetAnchor()
-{
-	anchor_ = *this;
-	checkNewWordPosition();
-}
-
-
-void Cursor::markNewWordPosition()
-{
-	if (lyxrc.spellcheck_continuously && inTexted() && new_word_.empty()) {
-		FontSpan nw = locateWord(WHOLE_WORD);
-		if (nw.size() == 1) {
-			LYXERR(Debug::DEBUG, "start new word: "
-				<< " par: " << pit()
-				<< " pos: " << nw.first);
-			new_word_ = *this;
-		}
-	}
-}
-
-
-void Cursor::clearNewWordPosition()
-{
-	if (!new_word_.empty()) {
-		LYXERR(Debug::DEBUG, "clear new word: "
-			<< " par: " << pit()
-			<< " pos: " << pos());
-		new_word_.resize(0);
-	}
-}
-
-
-void Cursor::checkNewWordPosition()
-{
-	if (!lyxrc.spellcheck_continuously || new_word_.empty())
-		return ;
-	if (!inTexted())
-		clearNewWordPosition();
-	else {
-		// forget the position of the current new word if
-		// 1) the paragraph changes or
-		// 2) the count of nested insets changes or
-		// 3) the cursor pos is out of paragraph bound
-		if (pit() != new_word_.pit() ||
-			depth() != new_word_.depth() ||
-			new_word_.pos() > new_word_.lastpos()) {
-			clearNewWordPosition();
-		} else if (new_word_.fixIfBroken())
-			// 4) or the remembered position was "broken"
-			clearNewWordPosition();
-		else {
-			FontSpan nw = locateWord(WHOLE_WORD);
-			if (!nw.empty()) {
-				FontSpan ow = new_word_.locateWord(WHOLE_WORD);
-				if (nw.intersect(ow).empty())
-					clearNewWordPosition();
-				else
-					LYXERR(Debug::DEBUG, "new word: "
-						   << " par: " << pit()
-						   << " pos: " << nw.first << ".." << nw.last);
-			} else {
-				clearNewWordPosition();
-			}
-		}
-	}
-}
-
-
-bool Cursor::posBackward()
-{
-	if (pos() == 0)
-		return false;
-	--pos();
-	return true;
-}
-
-
-bool Cursor::posForward()
-{
-	if (pos() == lastpos())
-		return false;
-	++pos();
-	return true;
-}
-
-
 bool Cursor::posVisRight(bool skip_inset)
 {
 	Cursor new_cur = *this; // where we will move to
@@ -867,7 +1187,7 @@ bool findNonVirtual(Row const & row, Row::const_iterator & cit, bool onleft)
 	return cit != row.end() && !cit->isVirtual();
 }
 
-}
+} // namespace
 
 void Cursor::getSurroundingPos(pos_type & left_pos, pos_type & right_pos) const
 {
@@ -876,12 +1196,11 @@ void Cursor::getSurroundingPos(pos_type & left_pos, pos_type & right_pos) const
 	right_pos = -1;
 
 	Row const & row = textRow();
-	TextMetrics const & tm = bv_->textMetrics(text());
 	double dummy = 0;
-	Row::const_iterator cit = tm.findRowElement(row, pos(), boundary(), dummy);
+	Row::const_iterator cit = row.findElement(pos(), boundary(), dummy);
 	// Handle the case of empty row
 	if (cit == row.end()) {
-		if (paragraph().isRTL(buffer()->params()))
+		if (row.isRTL())
 			right_pos = row.pos();
 		else
 			left_pos = row.pos() - 1;
@@ -955,10 +1274,8 @@ void Cursor::getSurroundingPos(pos_type & left_pos, pos_type & right_pos) const
 
 bool Cursor::posVisToNewRow(bool movingLeft)
 {
-	Paragraph const & par = paragraph();
-	Buffer const & buf = *buffer();
 	Row const & row = textRow();
-	bool par_is_LTR = !par.isRTL(buf.params());
+	bool par_is_LTR = !row.isRTL();
 
 	// Inside a table, determining whether to move to the next or
 	// previous row should be done based on the table's direction.
@@ -995,151 +1312,44 @@ bool Cursor::posVisToNewRow(bool movingLeft)
 		} else { // move to next row in this par
 			pos() = row.endpos();
 			boundary(false);
-		}
-	}
-
-	// make sure we're at left-/right-most pos in new row
-	posVisToRowExtremity(!movingLeft);
-
-	return true;
-}
-
-
-void Cursor::posVisToRowExtremity(bool left)
-{
-	LYXERR(Debug::RTL, "entering extremity: " << pit() << "," << pos() << ","
-		<< (boundary() ? 1 : 0));
-
-	TextMetrics const & tm = bv_->textMetrics(text());
-	// Looking for extremities is like clicking on the left or the
-	// right of the row.
-	int x = tm.origin().x_ + (left ? 0 : textRow().width());
-	bool b = false;
-	pos() = tm.getPosNearX(textRow(), x, b);
-	boundary(b);
-
-	LYXERR(Debug::RTL, "leaving extremity: " << pit() << "," << pos() << ","
-		<< (boundary() ? 1 : 0));
-}
-
-
-bool Cursor::reverseDirectionNeeded() const
-{
-	/*
-	 * We determine the directions based on the direction of the
-	 * bottom() --- i.e., outermost --- paragraph, because that is
-	 * the only way to achieve consistency of the arrow's movements
-	 * within a paragraph, and thus avoid situations in which the
-	 * cursor gets stuck.
-	 */
-	return bottom().paragraph().isRTL(bv().buffer().params());
-}
-
-
-CursorSlice Cursor::normalAnchor() const
-{
-	if (!selection())
-		return top();
-	// LASSERT: There have been several bugs around this code, that seem
-	// to involve failures to reset the anchor. We can at least not crash
-	// in release mode by resetting it ourselves.
-	LASSERT(anchor_.depth() >= depth(),
-		const_cast<DocIterator &>(anchor_) = *this);
-
-	CursorSlice normal = anchor_[depth() - 1];
-	if (depth() < anchor_.depth() && top() <= normal) {
-		// anchor is behind cursor -> move anchor behind the inset
-		++normal.pos();
-	}
-	return normal;
-}
-
-
-DocIterator & Cursor::realAnchor()
-{
-	return anchor_;
-}
-
-
-CursorSlice Cursor::selBegin() const
-{
-	if (!selection())
-		return top();
-	return normalAnchor() < top() ? normalAnchor() : top();
-}
-
-
-CursorSlice Cursor::selEnd() const
-{
-	if (!selection())
-		return top();
-	return normalAnchor() > top() ? normalAnchor() : top();
-}
-
-
-DocIterator Cursor::selectionBegin() const
-{
-	if (!selection())
-		return *this;
-
-	DocIterator di;
-	// FIXME: This is a work-around for the problem that
-	// CursorSlice doesn't keep track of the boundary.
-	if (normalAnchor() == top())
-		di = anchor_.boundary() > boundary() ? anchor_ : *this;
-	else
-		di = normalAnchor() < top() ? anchor_ : *this;
-	di.resize(depth());
-	return di;
-}
-
-
-DocIterator Cursor::selectionEnd() const
-{
-	if (!selection())
-		return *this;
+		}
+	}
 
-	DocIterator di;
-	// FIXME: This is a work-around for the problem that
-	// CursorSlice doesn't keep track of the boundary.
-	if (normalAnchor() == top())
-		di = anchor_.boundary() < boundary() ? anchor_ : *this;
-	else
-		di = normalAnchor() > top() ? anchor_ : *this;
+	// make sure we're at left-/right-most pos in new row
+	posVisToRowExtremity(!movingLeft);
 
-	if (di.depth() > depth()) {
-		di.resize(depth());
-		++di.pos();
-	}
-	return di;
+	return true;
 }
 
 
-void Cursor::setSelection()
+void Cursor::posVisToRowExtremity(bool left)
 {
-	setSelection(true);
-	if (idx() == normalAnchor().idx() &&
-	    pit() == normalAnchor().pit() &&
-	    pos() == normalAnchor().pos())
-		setSelection(false);
-}
+	LYXERR(Debug::RTL, "entering extremity: " << pit() << "," << pos() << ","
+		<< (boundary() ? 1 : 0));
 
+	TextMetrics const & tm = bv_->textMetrics(text());
+	// Looking for extremities is like clicking on the left or the
+	// right of the row.
+	int x = tm.origin().x_ + (left ? 0 : textRow().width());
+	bool b = false;
+	pos() = tm.getPosNearX(textRow(), x, b);
+	boundary(b);
 
-void Cursor::setSelection(DocIterator const & where, int n)
-{
-	setCursor(where);
-	setSelection(true);
-	anchor_ = where;
-	pos() += n;
+	LYXERR(Debug::RTL, "leaving extremity: " << pit() << "," << pos() << ","
+		<< (boundary() ? 1 : 0));
 }
 
 
-void Cursor::clearSelection()
+bool Cursor::reverseDirectionNeeded() const
 {
-	setSelection(false);
-	setWordSelection(false);
-	setMark(false);
-	resetAnchor();
+	/*
+	 * We determine the directions based on the direction of the
+	 * bottom() --- i.e., outermost --- paragraph, because that is
+	 * the only way to achieve consistency of the arrow's movements
+	 * within a paragraph, and thus avoid situations in which the
+	 * cursor gets stuck.
+	 */
+	return bottom().paragraph().isRTL(bv().buffer().params());
 }
 
 
@@ -1172,36 +1382,53 @@ void Cursor::updateTextTargetOffset()
 }
 
 
-void Cursor::info(odocstream & os) const
+void Cursor::setClickPos(int x, int y)
 {
-	for (int i = 1, n = depth(); i < n; ++i) {
-		operator[](i).inset().infoize(os);
-		os << "  ";
-	}
-	if (pos() != 0) {
-		Inset const * inset = prevInset();
-		// prevInset() can return 0 in certain case.
-		if (inset)
-			prevInset()->infoize2(os);
-	}
+	x_clickpos_ = x;
+	y_clickpos_ = y;
 }
 
 
-bool Cursor::selHandle(bool sel)
+bool Cursor::selHandle(bool selecting)
 {
 	//lyxerr << "Cursor::selHandle" << endl;
 	if (mark())
-		sel = true;
-	if (sel == selection())
+		selecting = true;
+	if (selecting == selection())
 		return false;
 
-	if (!sel)
+	if (!selecting)
 		cap::saveSelection(*this);
 
 	resetAnchor();
-	setSelection(sel);
+	selection(selecting);
 	return true;
 }
+
+
+bool Cursor::atFirstOrLastRow(bool up)
+{
+	TextMetrics const & tm = bv_->textMetrics(text());
+	ParagraphMetrics const & pm = tm.parMetrics(pit());
+
+	int row;
+	if (pos() && boundary())
+		row = pm.pos2row(pos() - 1);
+	else
+		row = pm.pos2row(pos());
+
+	if (up) {
+		if (pit() == 0 && row == 0)
+			return true;
+	} else {
+		if (pit() + 1 >= int(text()->paragraphs().size()) &&
+			row + 1 >= int(pm.rows().size()))
+			return true;
+	}
+	return false;
+}
+
+
 } // namespace lyx
 
 
@@ -1215,36 +1442,13 @@ bool Cursor::selHandle(bool sel)
 ///////////////////////////////////////////////////////////////////
 
 #include "mathed/InsetMathChar.h"
-#include "mathed/InsetMathGrid.h"
-#include "mathed/InsetMathScript.h"
 #include "mathed/InsetMathUnknown.h"
-#include "mathed/MathFactory.h"
 #include "mathed/MathStream.h"
 #include "mathed/MathSupport.h"
 
 
 namespace lyx {
 
-bool Cursor::isInside(Inset const * p) const
-{
-	for (size_t i = 0; i != depth(); ++i)
-		if (&operator[](i).inset() == p)
-			return true;
-	return false;
-}
-
-
-void Cursor::leaveInset(Inset const & inset)
-{
-	for (size_t i = 0; i != depth(); ++i) {
-		if (&operator[](i).inset() == &inset) {
-			resize(i);
-			return;
-		}
-	}
-}
-
-
 bool Cursor::openable(MathAtom const & t) const
 {
 	if (!t->isActive())
@@ -1257,41 +1461,21 @@ bool Cursor::openable(MathAtom const & t) const
 		return true;
 
 	// we can't move into anything new during selection
-	if (depth() >= anchor_.depth())
+	if (depth() >= realAnchor().depth())
 		return false;
-	if (t.nucleus() != &anchor_[depth()].inset())
+	if (t.nucleus() != &realAnchor()[depth()].inset())
 		return false;
 
 	return true;
 }
 
 
-void Cursor::setScreenPos(int x, int /*y*/)
-{
-	setTargetX(x);
-	//bruteFind(*this, x, y, 0, bv().workWidth(), 0, bv().workHeight());
-}
-
-
-
 void Cursor::plainErase()
 {
 	cell().erase(pos());
 }
 
 
-void Cursor::markInsert()
-{
-	insert(char_type(0));
-}
-
-
-void Cursor::markErase()
-{
-	cell().erase(pos());
-}
-
-
 void Cursor::plainInsert(MathAtom const & t)
 {
 	cell().insert(pos(), t);
@@ -1302,14 +1486,6 @@ void Cursor::plainInsert(MathAtom const & t)
 }
 
 
-void Cursor::insert(docstring const & str)
-{
-	for_each(str.begin(), str.end(),
-		 bind(static_cast<void(Cursor::*)(char_type)>
-			     (&Cursor::insert), this, _1));
-}
-
-
 void Cursor::insert(char_type c)
 {
 	//lyxerr << "Cursor::insert char '" << c << "'" << endl;
@@ -1323,12 +1499,10 @@ void Cursor::insert(char_type c)
 }
 
 
-void Cursor::insert(MathAtom const & t)
+void Cursor::insert(docstring const & str)
 {
-	//lyxerr << "Cursor::insert MathAtom '" << t << "'" << endl;
-	macroModeClose();
-	cap::selClearOrDel(*this);
-	plainInsert(t);
+	for (char_type c : str)
+		insert(c);
 }
 
 
@@ -1347,8 +1521,32 @@ void Cursor::insert(Inset * inset0)
 }
 
 
+void Cursor::insert(MathAtom const & t)
+{
+	LATTEST(inMathed());
+	//lyxerr << "Cursor::insert MathAtom '" << t << "'" << endl;
+	macroModeClose();
+	cap::selClearOrDel(*this);
+	plainInsert(t);
+}
+
+
+void Cursor::insert(MathData const & ar)
+{
+	LATTEST(inMathed());
+	macroModeClose();
+	if (selection())
+		cap::eraseSelection(*this);
+	cell().insert(pos(), ar);
+	pos() += ar.size();
+	// FIXME audit setBuffer calls
+	inset().setBuffer(bv_->buffer());
+}
+
+
 int Cursor::niceInsert(docstring const & t, Parse::flags f, bool enter)
 {
+	LATTEST(inMathed());
 	MathData ar(buffer());
 	asArray(t, ar, f);
 	if (ar.size() == 1 && (enter || selection()))
@@ -1361,19 +1559,17 @@ int Cursor::niceInsert(docstring const & t, Parse::flags f, bool enter)
 
 void Cursor::niceInsert(MathAtom const & t)
 {
+	LATTEST(inMathed());
 	macroModeClose();
 	docstring const safe = cap::grabAndEraseSelection(*this);
 	plainInsert(t);
 	// If possible, enter the new inset and move the contents of the selection
 	if (t->isActive()) {
-		posBackward();
-		// be careful here: don't use 'pushBackward(t)' as this we need to
-		// push the clone, not the original
-		pushBackward(*nextInset());
-		// We may not use niceInsert here (recursion)
+		idx_type const idx = prevMath().asNestInset()->firstIdx();
 		MathData ar(buffer());
 		asArray(safe, ar);
-		insert(ar);
+		prevMath().cell(idx).insert(0, ar);
+		editInsertedInset();
 	} else if (t->asMacro() && !safe.empty()) {
 		MathData ar(buffer());
 		asArray(safe, ar);
@@ -1387,19 +1583,7 @@ void Cursor::niceInsert(MathAtom const & t)
 }
 
 
-void Cursor::insert(MathData const & ar)
-{
-	macroModeClose();
-	if (selection())
-		cap::eraseSelection(*this);
-	cell().insert(pos(), ar);
-	pos() += ar.size();
-	// FIXME audit setBuffer calls
-	inset().setBuffer(bv_->buffer());
-}
-
-
-bool Cursor::backspace()
+bool Cursor::backspace(bool const force)
 {
 	if (selection()) {
 		cap::eraseSelection(*this);
@@ -1419,9 +1603,20 @@ bool Cursor::backspace()
 			// [|], can not delete from inside
 			return false;
 		} else {
-			if (inMathed())
-				pullArg();
-			else
+			if (inMathed()) {
+				switch (inset().asInsetMath()->getType()) {
+				case hullEqnArray:
+				case hullAlign:
+				case hullFlAlign: {
+					FuncRequest cmd(LFUN_CHAR_BACKWARD);
+					this->dispatch(cmd);
+					break;
+				}
+				default:
+					pullArg();
+					break;
+				}
+			} else
 				popBackward();
 			return true;
 		}
@@ -1435,11 +1630,11 @@ bool Cursor::backspace()
 		}
 	}
 
-	if (pos() != 0 && prevAtom()->nargs() > 0) {
+	if (pos() != 0 && !force && prevAtom()->confirmDeletion()) {
 		// let's require two backspaces for 'big stuff' and
 		// highlight on the first
 		resetAnchor();
-		setSelection(true);
+		selection(true);
 		--pos();
 	} else {
 		--pos();
@@ -1449,7 +1644,7 @@ bool Cursor::backspace()
 }
 
 
-bool Cursor::erase()
+bool Cursor::erase(bool const force)
 {
 	if (inMacroMode())
 		return true;
@@ -1484,9 +1679,9 @@ bool Cursor::erase()
 	}
 
 	// 'clever' UI hack: only erase large items if previously slected
-	if (pos() != lastpos() && nextAtom()->nargs() > 0) {
+	if (pos() != lastpos() && !force && nextAtom()->confirmDeletion()) {
 		resetAnchor();
-		setSelection(true);
+		selection(true);
 		++pos();
 	} else {
 		plainErase();
@@ -1522,7 +1717,47 @@ bool Cursor::down()
 }
 
 
-bool Cursor::macroModeClose()
+void Cursor::handleNest(MathAtom const & a)
+{
+	idx_type const idx = a.nucleus()->asNestInset()->firstIdx();
+	//lyxerr << "Cursor::handleNest: " << idx << endl;
+	InsetMath const * im = selectionBegin().inset().asInsetMath();
+	Parse::flags const f = im && im->currentMode() != InsetMath::MATH_MODE
+		? Parse::TEXTMODE : Parse::NORMAL;
+	MathAtom t = a;
+	asArray(cap::grabAndEraseSelection(*this), t.nucleus()->cell(idx), f);
+	insert(t);
+	editInsertedInset();
+}
+
+
+int Cursor::targetX() const
+{
+	if (x_target() != -1)
+		return x_target();
+	int x = 0;
+	int y = 0;
+	getPos(x, y);
+	return x;
+}
+
+
+int Cursor::textTargetOffset() const
+{
+	return textTargetOffset_;
+}
+
+
+void Cursor::setTargetX()
+{
+	int x;
+	int y;
+	getPos(x, y);
+	setTargetX(x);
+}
+
+
+bool Cursor::macroModeClose(bool cancel)
 {
 	if (!inMacroMode())
 		return false;
@@ -1534,42 +1769,69 @@ bool Cursor::macroModeClose()
 	--pos();
 	cell().erase(pos());
 
-	// do nothing if the macro name is empty
-	if (s == "\\")
-		return false;
-
 	// trigger updates of macros, at least, if no full
 	// updates take place anyway
 	screenUpdateFlags(Update::Force);
 
+	// do nothing if the macro name is empty
+	if (s == "\\" || cancel) {
+		return false;
+	}
+
 	docstring const name = s.substr(1);
 	InsetMathNest * const in = inset().asInsetMath()->asNestInset();
 	if (in && in->interpretString(*this, s))
 		return true;
-	MathAtom atom = buffer()->getMacro(name, *this, false) ?
-		MathAtom(new MathMacro(buffer(), name)) : createInsetMath(name, buffer());
+	bool const user_macro = buffer()->getMacro(name, *this, false);
+	MathAtom atom = user_macro ? MathAtom(new InsetMathMacro(buffer(), name))
+				   : createInsetMath(name, buffer());
 
 	// try to put argument into macro, if we just inserted a macro
 	bool macroArg = false;
-	MathMacro * atomAsMacro = atom.nucleus()->asMacro();
+	InsetMathMacro * atomAsMacro = atom.nucleus()->asMacro();
+	InsetMathNest * atomAsNest = atom.nucleus()->asNestInset();
 	if (atomAsMacro) {
 		// macros here are still unfolded (in init mode in fact). So
 		// we have to resolve the macro here manually and check its arity
 		// to put the selection behind it if arity > 0.
 		MacroData const * data = buffer()->getMacro(atomAsMacro->name());
-		if (!selection.empty() && data && data->numargs() - data->optionals() > 0) {
+		if (!selection.empty() && data && data->numargs()) {
 			macroArg = true;
-			atomAsMacro->setDisplayMode(MathMacro::DISPLAY_INTERACTIVE_INIT, 1);
+			atomAsMacro->setDisplayMode(InsetMathMacro::DISPLAY_INTERACTIVE_INIT, 1);
 		} else
 			// non-greedy case. Do not touch the arguments behind
-			atomAsMacro->setDisplayMode(MathMacro::DISPLAY_INTERACTIVE_INIT, 0);
+			atomAsMacro->setDisplayMode(InsetMathMacro::DISPLAY_INTERACTIVE_INIT, 0);
 	}
 
 	// insert remembered selection into first argument of a non-macro
-	else if (atom.nucleus()->nargs() > 0)
-		atom.nucleus()->cell(0).append(selection);
-
-	plainInsert(atom);
+	else if (atomAsNest && atomAsNest->nargs() > 0)
+		atomAsNest->cell(atomAsNest->firstIdx()).append(selection);
+
+	MathWordList const & words = mathedWordList();
+	MathWordList::const_iterator it = words.find(name);
+	bool keep_mathmode = user_macro
+		|| (it != words.end() && (it->second.inset == "font"
+		                          || it->second.inset == "oldfont"
+		                          || it->second.inset == "textsize"
+		                          || it->second.inset == "mbox"));
+	bool ert_macro = !user_macro && it == words.end() && atomAsMacro;
+
+	if (in && in->currentMode() == Inset::TEXT_MODE
+	    && atom.nucleus()->currentMode() == Inset::MATH_MODE
+	    && name != from_ascii("ensuremath") && !ert_macro) {
+		MathAtom at(new InsetMathEnsureMath(buffer()));
+		at.nucleus()->cell(0).push_back(atom);
+		niceInsert(at);
+		posForward();
+	} else if (in && in->currentMode() == Inset::MATH_MODE
+		   && atom.nucleus()->currentMode() == Inset::TEXT_MODE
+		   && !keep_mathmode) {
+		MathAtom at = createInsetMath("text", buffer());
+		at.nucleus()->cell(0).push_back(atom);
+		niceInsert(at);
+		posForward();
+	} else
+		plainInsert(atom);
 
 	// finally put the macro argument behind, if needed
 	if (macroArg) {
@@ -1583,49 +1845,6 @@ bool Cursor::macroModeClose()
 }
 
 
-docstring Cursor::macroName()
-{
-	return inMacroMode() ? activeMacro()->name() : docstring();
-}
-
-
-void Cursor::handleNest(MathAtom const & a, int c)
-{
-	//lyxerr << "Cursor::handleNest: " << c << endl;
-	MathAtom t = a;
-	asArray(cap::grabAndEraseSelection(*this), t.nucleus()->cell(c));
-	insert(t);
-	posBackward();
-	pushBackward(*nextInset());
-}
-
-
-int Cursor::targetX() const
-{
-	if (x_target() != -1)
-		return x_target();
-	int x = 0;
-	int y = 0;
-	getPos(x, y);
-	return x;
-}
-
-
-int Cursor::textTargetOffset() const
-{
-	return textTargetOffset_;
-}
-
-
-void Cursor::setTargetX()
-{
-	int x;
-	int y;
-	getPos(x, y);
-	setTargetX(x);
-}
-
-
 bool Cursor::inMacroMode() const
 {
 	if (!inMathed())
@@ -1639,13 +1858,19 @@ bool Cursor::inMacroMode() const
 
 InsetMathUnknown * Cursor::activeMacro()
 {
-	return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : 0;
+	return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : nullptr;
 }
 
 
 InsetMathUnknown const * Cursor::activeMacro() const
 {
-	return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : 0;
+	return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : nullptr;
+}
+
+
+docstring Cursor::macroName()
+{
+	return inMacroMode() ? activeMacro()->name() : docstring();
 }
 
 
@@ -1655,23 +1880,9 @@ void Cursor::pullArg()
 	MathData ar = cell();
 	if (popBackward() && inMathed()) {
 		plainErase();
-		cell().insert(pos(), ar);
-		resetAnchor();
-	} else {
-		//formula()->mutateToText();
-	}
-}
-
-
-void Cursor::touch()
-{
-	// FIXME: look here
-#if 0
-	DocIterator::const_iterator it = begin();
-	DocIterator::const_iterator et = end();
-	for ( ; it != et; ++it)
-		it->cell().touch();
-#endif
+		cell().insert(pos(), ar);
+		resetAnchor();
+	}
 }
 
 
@@ -1689,9 +1900,8 @@ void Cursor::normalize()
 			<< pos() << ' ' << lastpos() <<  " in idx: " << idx()
 		       << " in atom: '";
 		odocstringstream os;
-		TexRow texrow(false);
-		otexrowstream ots(os,texrow);
-		WriteStream wi(ots, false, true, WriteStream::wsDefault);
+		otexrowstream ots(os);
+		TeXMathStream wi(ots, false, true, TeXMathStream::wsDefault);
 		inset().asInsetMath()->write(wi);
 		lyxerr << to_utf8(os.str()) << endl;
 		pos() = lastpos();
@@ -1794,7 +2004,9 @@ bool Cursor::upDownInMath(bool up)
 		//lyxerr << "idxUpDown triggered" << endl;
 		// try to find best position within this inset
 		if (!selection())
-			setCursor(bruteFind2(*this, xo, yo));
+			setCursor(bruteFind(*this, xo, yo));
+		// FIXME : this is actually only needed for InsetMathMacro (bug #12952).
+		screenUpdateFlags(Update::SinglePar);
 		return true;
 	}
 
@@ -1815,24 +2027,117 @@ bool Cursor::upDownInMath(bool up)
 }
 
 
-bool Cursor::atFirstOrLastRow(bool up)
-{
-	TextMetrics const & tm = bv_->textMetrics(text());
-	ParagraphMetrics const & pm = tm.parMetrics(pit());
+bool Cursor::mathForward(bool word)
+{
+	LASSERT(inMathed(), return false);
+	if (pos() < lastpos()) {
+		if (word) {
+			// word: skip a group of insets of the form X*(B*|R*|P*) (greedy
+			// match) where X is any math class, B is mathbin, R is mathrel, and
+			// P is mathpunct. Make sure that the following remains true:
+			//   mathForward(true); mathBackward(true); mathForward(true)
+			// is the same as mathForward(true) and
+			//   mathBackward(true); mathForward(true); mathBackward(true)
+			// is the same as mathBackward(true).
+			MathClass mc = nextMath().mathClass();
+			do
+				posForward();
+			while (pos() < lastpos() && mc == nextMath().mathClass());
+			if (pos() < lastpos() &&
+			    ((mc = nextMath().mathClass()) == MC_BIN ||
+			     mc == MC_REL || mc == MC_PUNCT))
+				do
+					posForward();
+				while (pos() < lastpos() && mc == nextMath().mathClass());
+		} else if (openable(nextAtom())) {
+			InsetMathScript const * n = nextMath().asScriptInset();
+			bool to_brace_deco = n && !n->nuc().empty()
+				&& n->nuc().back()->lyxCode() == MATH_DECORATION_CODE
+				&& n->nuc().back()->mathClass() == MC_OP;
+			// single step: try to enter the next inset
+			pushBackward(nextMath());
+			inset().idxFirst(*this);
+			// Make sure the cursor moves directly to an
+			// \overbrace or \underbrace inset (bug 2264)
+			if (to_brace_deco) {
+				pushBackward(nextMath());
+				inset().idxFirst(*this);
+			}
+		} else
+			posForward();
+		return true;
+	}
+	if (inset().idxForward(*this))
+		return true;
+	InsetMath const * m = inset().asInsetMath();
+	bool from_brace_deco = m
+		&& m->lyxCode() == MATH_DECORATION_CODE
+		&& m->mathClass() == MC_OP;
+	// try to pop forwards --- but don't pop out of math! leave that to
+	// the FINISH lfuns
+	int s = depth() - 2;
+	if (s >= 0 && operator[](s).inset().asInsetMath() && popForward()) {
+		// Make sure the cursor moves directly to an
+		// \overbrace or \underbrace inset (bug 2264)
+		bool to_script = inset().asInsetMath()
+			&& inset().asInsetMath()->asScriptInset();
+		return from_brace_deco && to_script ? mathForward(word) : true;
+	}
+	return false;
+}
 
-	int row;
-	if (pos() && boundary())
-		row = pm.pos2row(pos() - 1);
-	else
-		row = pm.pos2row(pos());
 
-	if (up) {
-		if (pit() == 0 && row == 0)
-			return true;
-	} else {
-		if (pit() + 1 >= int(text()->paragraphs().size()) &&
-				row + 1 >= int(pm.rows().size()))
-			return true;
+bool Cursor::mathBackward(bool word)
+{
+	LASSERT(inMathed(), return false);
+	if (pos() > 0) {
+		if (word) {
+			// word: skip a group of insets. See the comment in mathForward.
+			MathClass mc = prevMath().mathClass();
+			do
+				posBackward();
+			while (pos() > 0 && mc == prevMath().mathClass());
+			if (pos() > 0 && (mc == MC_BIN || mc == MC_REL || mc == MC_PUNCT)) {
+				mc = prevMath().mathClass();
+				do
+					posBackward();
+				while (pos() > 0 && mc == prevMath().mathClass());
+			}
+		} else if (openable(prevAtom())) {
+			InsetMathScript const * p = prevMath().asScriptInset();
+			bool to_brace_deco = p && !p->nuc().empty()
+				&& p->nuc().back()->lyxCode() == MATH_DECORATION_CODE
+				&& p->nuc().back()->mathClass() == MC_OP;
+			// single step: try to enter the preceding inset
+			posBackward();
+			push(nextMath());
+			inset().idxLast(*this);
+			// Make sure the cursor moves directly to an
+			// \overbrace or \underbrace inset (bug 2264)
+			if (to_brace_deco) {
+				posBackward();
+				push(nextMath());
+				inset().idxLast(*this);
+			}
+		} else
+			posBackward();
+		return true;
+	}
+	if (inset().idxBackward(*this))
+		return true;
+	InsetMath const * m = inset().asInsetMath();
+	bool from_brace_deco = m
+		&& m->lyxCode() == MATH_DECORATION_CODE
+		&& m->mathClass() == MC_OP;
+	// try to pop backwards --- but don't pop out of math! leave that to
+	// the FINISH lfuns
+	int s = depth() - 2;
+	if (s >= 0 && operator[](s).inset().asInsetMath() && popBackward()) {
+		// Make sure the cursor moves directly to an
+		// \overbrace or \underbrace inset (bug 2264)
+		bool to_script = inset().asInsetMath()
+			&& inset().asInsetMath()->asScriptInset();
+		return from_brace_deco && to_script ? mathBackward(word) : true;
 	}
 	return false;
 }
@@ -1926,13 +2231,16 @@ bool Cursor::upDownInText(bool up, bool & updateNeeded)
 
 	// with and without selection are handled differently
 	if (!selection()) {
-		int yo = bv().getPos(*this).y_;
+		int yo1 = bv().getPos(*this).y_;
 		Cursor old = *this;
 		// To next/previous row
+		// FIXME: the y position is often guessed wrongly across styles and
+		// insets, which leads to weird behaviour.
 		if (up)
-			tm.editXY(*this, xo, yo - textRow().ascent() - 1);
+			tm.editXY(*this, xo, yo1 - textRow().ascent() - 1);
 		else
-			tm.editXY(*this, xo, yo + textRow().descent() + 1);
+			tm.editXY(*this, xo, yo1 + textRow().descent() + 1);
+		x_target_ = old.x_target_;
 		clearSelection();
 
 		// This happens when you move out of an inset.
@@ -1959,10 +2267,10 @@ bool Cursor::upDownInText(bool up, bool & updateNeeded)
 				--next_row;
 			} else if (pit() > 0) {
 				--pit();
-				TextMetrics & tm = bv_->textMetrics(text());
-				if (!tm.contains(pit()))
-					tm.newParMetricsUp();
-				ParagraphMetrics const & pmcur = tm.parMetrics(pit());
+				TextMetrics & tm2 = bv_->textMetrics(text());
+				if (!tm2.contains(pit()))
+					tm2.newParMetricsUp();
+				ParagraphMetrics const & pmcur = tm2.parMetrics(pit());
 				next_row = pmcur.rows().size() - 1;
 			}
 		} else {
@@ -1970,9 +2278,9 @@ bool Cursor::upDownInText(bool up, bool & updateNeeded)
 				++next_row;
 			} else if (pit() + 1 < int(text()->paragraphs().size())) {
 				++pit();
-				TextMetrics & tm = bv_->textMetrics(text());
-				if (!tm.contains(pit()))
-					tm.newParMetricsDown();
+				TextMetrics & tm2 = bv_->textMetrics(text());
+				if (!tm2.contains(pit()))
+					tm2.newParMetricsDown();
 				next_row = 0;
 			}
 		}
@@ -1981,6 +2289,8 @@ bool Cursor::upDownInText(bool up, bool & updateNeeded)
 		bool bound = false;
 		top().pos() = tm.getPosNearX(real_next_row, xo, bound);
 		boundary(bound);
+		// When selection==false, this is done by TextMetrics::editXY
+		setCurrentFont();
 
 		updateNeeded |= bv().checkDepm(*this, old);
 	}
@@ -2030,124 +2340,6 @@ void Cursor::handleFont(string const & font)
 }
 
 
-void Cursor::message(docstring const & msg) const
-{
-	disp_.setMessage(msg);
-}
-
-
-void Cursor::errorMessage(docstring const & msg) const
-{
-	disp_.setMessage(msg);
-	disp_.setError(true);
-}
-
-
-namespace {
-
-docstring parbreak(Cursor const * cur)
-{
-	odocstringstream os;
-	os << '\n';
-	// only add blank line if we're not in a ParbreakIsNewline situation
-	if (!cur->inset().getLayout().parbreakIsNewline()
-	    && !cur->paragraph().layout().parbreak_is_newline)
-		os << '\n';
-	return os.str();
-}
-
-}
-
-
-docstring Cursor::selectionAsString(bool with_label) const
-{
-	if (!selection())
-		return docstring();
-
-	if (inMathed())
-		return cap::grabSelection(*this);
-
-	int const label = with_label
-		? AS_STR_LABEL | AS_STR_INSETS : AS_STR_INSETS;
-
-	idx_type const startidx = selBegin().idx();
-	idx_type const endidx = selEnd().idx();
-	if (startidx != endidx) {
-		// multicell selection
-		InsetTabular * table = inset().asInsetTabular();
-		LASSERT(table, return docstring());
-		return table->asString(startidx, endidx);
-	}
-
-	ParagraphList const & pars = text()->paragraphs();
-
-	pit_type const startpit = selBegin().pit();
-	pit_type const endpit = selEnd().pit();
-	size_t const startpos = selBegin().pos();
-	size_t const endpos = selEnd().pos();
-
-	if (startpit == endpit)
-		return pars[startpit].asString(startpos, endpos, label);
-
-	// First paragraph in selection
-	docstring result = pars[startpit].
-		asString(startpos, pars[startpit].size(), label)
-		+ parbreak(this);
-
-	// The paragraphs in between (if any)
-	for (pit_type pit = startpit + 1; pit != endpit; ++pit) {
-		Paragraph const & par = pars[pit];
-		result += par.asString(0, par.size(), label)
-			+ parbreak(this);
-	}
-
-	// Last paragraph in selection
-	result += pars[endpit].asString(0, endpos, label);
-
-	return result;
-}
-
-
-docstring Cursor::currentState() const
-{
-	if (inMathed()) {
-		odocstringstream os;
-		info(os);
-#ifdef DEVEL_VERSION
-		InsetMath * math = inset().asInsetMath();
-		if (math)
-			os << _(", Inset: ") << math->id();
-		os << _(", Cell: ") << idx();
-		os << _(", Position: ") << pos();
-#endif
-		return os.str();
-	}
-
-	if (inTexted())
-		return text()->currentState(*this);
-
-	return docstring();
-}
-
-
-docstring Cursor::getPossibleLabel() const
-{
-	return inMathed() ? from_ascii("eq:") : text()->getPossibleLabel(*this);
-}
-
-
-Encoding const * Cursor::getEncoding() const
-{
-	if (empty())
-		return 0;
-	CursorSlice const & sl = innerTextSlice();
-	Text const & text = *sl.text();
-	Font font = text.getPar(sl.pit()).getFont(
-		bv().buffer().params(), sl.pos(), text.outerFont(sl.pit()));
-	return font.language()->encoding();
-}
-
-
 void Cursor::undispatched() const
 {
 	disp_.dispatched(false);
@@ -2166,6 +2358,12 @@ void Cursor::screenUpdateFlags(Update::flags f) const
 }
 
 
+void Cursor::noScreenUpdate() const
+{
+	disp_.screenUpdate(Update::None);
+}
+
+
 void Cursor::forceBufferUpdate() const
 {
 	disp_.forceBufferUpdate();
@@ -2184,17 +2382,12 @@ bool Cursor::needBufferUpdate() const
 }
 
 
-void Cursor::noScreenUpdate() const
-{
-	disp_.screenUpdate(Update::None);
-}
-
-
 Font Cursor::getFont() const
 {
 	// The logic here should more or less match to the
 	// Cursor::setCurrentFont logic, i.e. the cursor height should
 	// give a hint what will happen if a character is entered.
+	// FIXME: this is not the case, what about removing this method ? (see #10478).
 
 	// HACK. far from being perfect...
 
@@ -2224,28 +2417,10 @@ Font Cursor::getFont() const
 }
 
 
-bool Cursor::fixIfBroken()
-{
-	bool const broken_cursor = DocIterator::fixIfBroken();
-	bool const broken_anchor = anchor_.fixIfBroken();
-
-	if (broken_cursor || broken_anchor) {
-		clearNewWordPosition();
-		clearSelection();
-		return true;
-	}
-	return false;
-}
-
-
 void Cursor::sanitize()
 {
 	setBuffer(&bv_->buffer());
-	DocIterator::sanitize();
-	if (selection())
-		anchor_.sanitize();
-	else
-		resetAnchor();
+	CursorData::sanitize();
 }
 
 
@@ -2286,6 +2461,22 @@ bool notifyCursorLeavesOrEnters(Cursor const & old, Cursor & cur)
 }
 
 
+void Cursor::setLanguageFromInput()
+{
+	if (!lyxrc.respect_os_kbd_language
+	    || !inTexted()
+	    || paragraph().isPassThru())
+		return;
+	string const & code = theApp()->inputLanguageCode();
+	Language const * lang = languages.getFromCode(code, buffer()->getLanguages());
+	if (lang) {
+		current_font.setLanguage(lang);
+		real_current_font.setLanguage(lang);
+	} else
+		LYXERR0("setLanguageFromCode: unknown language code " << code);
+}
+
+
 void Cursor::setCurrentFont()
 {
 	CursorSlice const & cs = innerTextSlice();
@@ -2319,6 +2510,9 @@ void Cursor::setCurrentFont()
 	current_font = par.getFontSettings(bufparams, cpos);
 	real_current_font = tm.displayFont(cpit, cpos);
 
+	// set language to input language
+	setLanguageFromInput();
+
 	// special case for paragraph end
 	if (cs.pos() == lastpos()
 	    && tm.isRTLBoundary(cpit, cs.pos())
@@ -2329,97 +2523,20 @@ void Cursor::setCurrentFont()
 		real_current_font.setLanguage(lang);
 		real_current_font.fontInfo().setNumber(FONT_OFF);
 	}
-}
-
-
-bool Cursor::textUndo()
-{
-	if (!buffer()->undo().textUndo(*this))
-		return false;
-	sanitize();
-	return true;
-}
-
-
-bool Cursor::textRedo()
-{
-	if (!buffer()->undo().textRedo(*this))
-		return false;
-	sanitize();
-	return true;
-}
-
-
-void Cursor::finishUndo() const
-{
-	buffer()->undo().finishUndo();
-}
-
-
-void Cursor::beginUndoGroup() const
-{
-	buffer()->undo().beginUndoGroup(*this);
-}
-
-
-void Cursor::endUndoGroup() const
-{
-	buffer()->undo().endUndoGroup(*this);
-}
-
-
-void Cursor::recordUndo(pit_type from, pit_type to) const
-{
-	buffer()->undo().recordUndo(*this, from, to);
-}
-
-
-void Cursor::recordUndo(pit_type from) const
-{
-	buffer()->undo().recordUndo(*this, from, pit());
-}
-
-
-void Cursor::recordUndo(UndoKind kind) const
-{
-	buffer()->undo().recordUndo(*this, kind);
-}
-
 
-void Cursor::recordUndoInset(Inset const * in) const
-{
-	buffer()->undo().recordUndoInset(*this, in);
-}
-
-
-void Cursor::recordUndoFullBuffer() const
-{
-	buffer()->undo().recordUndoFullBuffer(*this);
-}
-
-
-void Cursor::recordUndoBufferParams() const
-{
-	buffer()->undo().recordUndoBufferParams(*this);
-}
-
-
-void Cursor::recordUndoSelection() const
-{
-	if (inMathed()) {
-		if (cap::multipleCellsSelected(*this))
-			recordUndoInset();
-		else
-			recordUndo();
-	} else {
-		buffer()->undo().recordUndo(*this,
-			selBegin().pit(), selEnd().pit());
+	// No language in pass thru situations
+	if (cs.paragraph().isPassThru()) {
+		current_font.setLanguage(latex_language);
+		real_current_font.setLanguage(latex_language);
 	}
 }
 
 
 void Cursor::checkBufferStructure()
 {
+	if (buffer()->isInternal())
+		return;
+
 	Buffer const * master = buffer()->masterBuffer();
 	master->tocBackend().updateItem(*this);
 	if (master != buffer() && !master->hasGuiDelegate())
@@ -2429,4 +2546,22 @@ void Cursor::checkBufferStructure()
 }
 
 
+void Cursor::moveToClosestEdge(int const x, bool const edit)
+{
+	if (Inset const * inset = nextInset()) {
+		// stay in front of insets for which we want to open the dialog
+		// (e.g. InsetMathSpace).
+		if (edit && (inset->hasSettings() || !inset->contextMenuName().empty()))
+			return;
+		CoordCache::Insets const & insetCache = bv().coordCache().getInsets();
+		if (!insetCache.has(inset))
+			return;
+		int const wid = insetCache.dim(inset).wid;
+		Point p = insetCache.xy(inset);
+		if (x > p.x_ + (wid + 1) / 2)
+			posForward();
+	}
+}
+
+
 } // namespace lyx